Integrated circuit, method for driving the same, and semiconductor device
First Claim
1. A circuit comprising:
- a first flip-flop; and
a second flip-flop, the second flip-flop including a nonvolatile memory circuit,wherein in an operating state in which power is supplied to the circuit, the first flip-flop retains data,wherein in a resting state in which supply of power to the circuit is stopped, the second flip-flop retains data,wherein on transition from the operating state into the resting state, the data is transferred from the first flip-flop to the second flip-flop, andwherein on transition from the resting state into the operating state, the data is transferred from the second flip-flop to the first flip-flop.
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Accused Products
Abstract
An integrated circuit which can be switched to a resting state and can be returned from the resting state rapidly is provided. An integrated circuit whose power consumption can be reduced without the decrease in operation speed is provided. A method for driving the integrated circuit is provided. The integrated circuit includes a first flip-flop and a second flip-flop including a nonvolatile memory circuit. In an operating state in which power is supplied, the first flip-flop retains data. In a resting state in which supply of power is stopped, the second flip-flop retains data. On transition from the operating state into the resting state, the data is transferred from the first flip-flop to the second flip-flop. On return from the resting state to the operating state, the data is transferred from the second flip-flop to the first flip-flop.
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Citations
18 Claims
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1. A circuit comprising:
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a first flip-flop; and a second flip-flop, the second flip-flop including a nonvolatile memory circuit, wherein in an operating state in which power is supplied to the circuit, the first flip-flop retains data, wherein in a resting state in which supply of power to the circuit is stopped, the second flip-flop retains data, wherein on transition from the operating state into the resting state, the data is transferred from the first flip-flop to the second flip-flop, and wherein on transition from the resting state into the operating state, the data is transferred from the second flip-flop to the first flip-flop. - View Dependent Claims (2, 3, 4, 5)
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6. A circuit comprising a first flip-flop and a second flip-flop, the second flip-flop including a nonvolatile memory circuit,
wherein before a resting state in which supply of power to the first flip-flop and the second flip-flop is stopped, data retained in the first flip-flop is transferred to the second flip-flop, wherein in the resting state, the data is retained in the second flip-flop, and wherein after the resting state, the data in the first flip-flop is restored by the second flip-flop.
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11. A method for driving a circuit including a first flip-flop and a second flip-flop, the second flip-flop including a nonvolatile memory circuit, comprising the steps of:
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storing first data in the first flip-flop in a first period; outputting the first data from the first flip-flop and storing the first data in the second flip-flop in a second period after the first period; stopping supply of power to the circuit in a third period after the second period; restarting supply of power to the circuit and outputting the first data stored in the second flip-flop in a fourth period after the third period; and storing the first data in the first flip-flop in a fifth period after the fourth period. - View Dependent Claims (12)
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13. A method for driving a circuit including a first flip-flop, a second flip-flop, the second flip-flop including a nonvolatile memory circuit, and a selection circuit comprising the steps of:
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outputting first data from the selection circuit and storing the first data in the first flip-flop in a first period; outputting the first data from the first flip-flop and storing the first data in the second flip-flop in a second period after the first period; stopping supply of power to the circuit in a third period after the second period; restarting supply of power to the circuit and outputting the first data stored in the second flip-flop to the selection circuit in a fourth period after the third period; and outputting the first data from the selection circuit to the first flip-flop and storing the first data in the first flip-flop in a fifth period after the fourth period. - View Dependent Claims (14)
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15. A circuit comprising:
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a first flip-flop; and a second flip-flop, wherein the first flip-flop comprises first transistors, each including a semiconductor material other than an oxide semiconductor in a semiconductor layer, wherein the second flip-flop comprises a second transistor including an oxide semiconductor in a semiconductor layer, wherein the second flip-flop includes; a memory circuit that includes the second transistor and a storage capacitor; and an arithmetic portion, wherein one electrode of the second transistor is electrically connected to a first electrode of the storage capacitor, wherein the arithmetic portion includes a third transistor, and wherein a gate electrode of the third transistor is electrically connected to the one electrode of the second transistor. - View Dependent Claims (16, 17, 18)
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Specification